Table of Contents
Why can ammonia be dried using concentrated sulfuric acid?
Concentrated sulphuric acid is not used for drying ammonia gas because concentrated sulphuric acid (H2SO4) being acidic in nature reacts with basic ammonia gas tn give ammonium sulphate [(NH4)2SO4].
Why is ammonia not dried using anhydrous calcium chloride?
Why? When water is absorbed by calcium chloride, it undergoes hydrolysis to give hydrochloric acid. Since ammonia is basic, it is neutralised by HCl to give salt, NH3+HCl→NH4Cl.
Why concentrated sulphuric acid should not be used as drying agent for ammonia gas?
Concentrated sulphuric acid is not used for drying ammonia because it reacts with it to form ammonium sulphate. The actual chemical used for drying ammonia is Calcim oxide.
Can calcium chloride be used to dry ammonia?
Note: Calcium chloride is not suitable for drying ammonia, amines, alcohols, phenols, aldehydes, ketones and some esters because these substances are bound by CaCl2. Calcium chloride has a drying capacity up to 98\%. It binds the water through crystallization and can be regenerated by warming.
Why concentrated sulphuric acid is not used as a drying agent?
Sulphuric acid is not used as a drying agent for H2S because it reacts with H2S to form sulphur.
Which gas can be dried by H2SO4?
Hydrogen is dried by passing it through conc H2SO4
Which of the following gas can be dried using anhydrous calcium chloride as drying agent?
– Calcium chloride is highly hygroscopic in nature and absorbs almost 98\% of water but reacts exothermically with ammonia to form calcium chloride complexes. – Ammonia can be easily dried by passing over fresh quicklime, also known as soda lime because it is basic in nature and does not react with ammonia.
How ammonia gas is dried?
The moisture present in ammonia is removed by passing it through a glass tower packed with quick lime, CaO. For drying of ammonia gas, the common dehydrating agents like conc. H2SO4 or anhydrous calcium chloride or phosphorus pentoxide can’t be used as these react with ammonia.
Why is concentrated sulphuric acid not used for drying hydrogen sulphide gas?
Hydrogen sulphide gas cannot be dried using sulphuric acid as H2S gas is oxidised by sulphuric acid to Sulphur. Therefore, the H2S gas has chemical action with acid and hence it reacts with it , therefore, cannot be dried using it.
Why is CaO used to dry ammonia?
Ammonia can be easily dried by passing over fresh quicklime or soda lime (granules of calcium oxide and sodium hydroxide) because it is basic in nature and doesn’t react with ammonia. So, the answer is option ‘C’.
Why does calcium chloride react with ammonia?
ammonia is NH4 and as an ion is +1, chloride is -1 therefore ammonium chloride NH4Cl. After synthesis, ammonia can be selectively absorbed by calcium chloride; nitrogen and hydrogen are not absorbed. Calcium reacts with chloride to form CaCl2, and CaCl-.
Can concentrated sulphuric acid be used to dry hydrogen?
H2SO4 cannot be used for drying up H2S .